Located at the heart of downtown Atlanta, the construction of Allen Plaza, including 30 Allen Plaza, helped lead to the resurgence of Downtown Atlanta. Allen Plaza named for Ivan Allen Jr., the late Atlanta mayor who played a critical role in bringing the city together and promoting its central business district, is comprised of three blocks of a mixed-use development.
30 Allen Plaza is a 15-story structure that includes eight floors of Class A corporate office space totaling roughly 270,000 sq. ft. Included in this square footage is 15,584-sq.-ft. of retail space and a seven story, 242,959-sq.-ft., 582-space parking structure.
The exterior of the building is made of a full-curtain wall system featuring stone veneer, polished and thermal granite, precast for coping and ground level pilasters, vision glass and spandrel glass. The lobby features millwork and stone walls, polished metal appointments and marble floors.
The pour-in-place parking deck started with auger-cast foundations on the west end of the building, and about two-thirds of the way across it switched to large spread footings to get more depth to gain the strength needed. As construction continued, the east end switched to caissons because rock was not found. The project ended up with three different foundation systems in a 40,000 sq. ft. floor plate. The auger-cast piles on the west end measured as much as 95-feet deep, while the caissons on the other only had to extend to 12-feet deep.